Fixed-width addition transformer
Run rmb41c76 is a 1-block, bias-free causal transformer trained for
4-digit base-10 addition. Operands are zero-padded and answers use
5 digits, retaining overflow.
Results
| Metric | Value |
|---|---|
| Validation loss | 0.014791 |
| Validation generated-token accuracy | 99.38% |
| Validation exact-answer accuracy | 97.46% |
| No-carry exact-answer accuracy | 95.70% |
| Single-carry exact-answer accuracy | 99.22% |
| Multiple-carry exact-answer accuracy | 97.27% |
| Carry-chain exact-answer accuracy | 89.45% |
Training configuration
- Updates: 10000
- Optimizer: muon
- Muon peak learning rate: 0.02
- AdamW peak learning rate: 0.0003
- Weight decay: 0.01
- Warmup updates: 100
- Minimum learning-rate ratio: 0.1
- Initialization: normal
- Position encoding: full-head RoPE on queries and keys (theta 10000)
- Seed: 0
- Source commit:
unavailable
The complete resolved configuration, environment, metrics, source snapshot, and checkpoints are
available in training/. Machine-readable hashes and metrics are in
export_manifest.json.
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This repository contains custom Transformers code. For reproducible or security-sensitive use, pin the commit revision printed by the uploader.
from transformers import AutoModelForCausalLM, AutoTokenizer
revision = "PINNED_COMMIT_HASH"
tokenizer = AutoTokenizer.from_pretrained(
"OWNER/REPO", trust_remote_code=True, revision=revision
)
model = AutoModelForCausalLM.from_pretrained(
"OWNER/REPO", trust_remote_code=True, revision=revision
)
inputs = tokenizer("0000 + 0000 =", return_tensors="pt")
output = model.generate(**inputs, max_new_tokens=model.config.answer_digits, do_sample=False)
print(tokenizer.decode(output[0], skip_special_tokens=True))
Intended use and limitations
This model is intended for mechanistic-interpretability research on its configured fixed-width addition task. It is not a general arithmetic system: inputs outside the configured grammar or width are unsupported, and generated answers must not be treated as reliable calculations.